Type-writer.



No. 766,813. PATENTED AUG. 9, 1904 J. F. DAVID. TYPE WRITER.

APPLIOATIOX nun r1111, 20, 1901.

6 SHEETS-$3321 1.

H0 MODEL.

a @Qm w v27 v a WM mm NM Q km Q 3% ww Q \w mm My x 3. Q m x V. N E w xx.

W/T/YESSES:

No. 766,813. PATENTED AUG. 9, 1904.

J. F. DAVID. TYPE WRITER.

' APPLICATION nun 313.26. i901. so 110mm. e snnnws-snnnr 2.

nrmnsrs I No. 766,813. PATENTED AUG. 9, 1904 J. F. DAVID.

TYPE WRITER.

APPLIOATION FILED FEB. 26, 1901. H0 MODEL. B SHEETS-SHEET 3.

mum:

' PATENTBD AUG} 9, 1904 No. 766,813. I

J. F. DAVID.

TYPE WRITER.

APPLICATION FILED FEB. 26, 1901.

H0 MODEL. SHEETS-SHBET 4.

Y 9 w vavroe ZZ a)? ATTORNEVS PATENTED AUG. 9, 1904.

' J. F. DAVID. TYPE WRITER.

APPLICATION 2mm ran. 28, 1901.

a M! VENTOI? A TTORIIEJ'S Patented August 9, 1904.

UNITED STATES PATENT OFFICE.

JEAN FRANQOIS DAVID, OF NANITUA, FRANCE.

TYPE-"WRITER.

SPECIFICATION forming part of Letters Patent No. 766,813, dated August9, 1904.

Application filed February 26, 1901- Serial No. @8387. (N0 model.)

To all whom, it may concern:

Be it known that I, J nan FRANooIs DAVID, gentleman, residing at 84.Grande Rue. N antua, in the Republic of France, have invented certainnew and useful lmprovements in Type- Writers, of which the following-isa full,clear, and exact specification.

The subject of the present-invention has reference to improvements intype-writers.

My invention is shown in detail in the accompanying drawings, in which*Figure l is a sectional elevation of the ma chine along its axis. Fig. 2is a plan. Fig. 3 is a plan of the details of the arrangement of thetype-bars and guide. Fig. 4: is a crosssection of the carriage, showingthe line-spacing mechanism. Fig. 5 is a view of the bottom of themachine. the keyboard, inker, and carriage being supposed to be removed.Fig. 6 is a cross-section on AB of Fig. 1, showing the feeding mechanismfor the carriage. Fig. 7 is a partial sectional elevation showing thedetails of the mechanism of the type-bars. Fig. 8 is a side elevationshowing the detail of one ofthe key-reeds. Fig. 9 is a partial sectionalelevation showing the details of the mechanism for raising the inker bymeans of the line-spacing mechanism.

Referring by reference characters to the drawings, the letter adesignates a suitable case within which are supported the working partsand which maybe provided with a suitable cover, if desired. A pair ofparallel plates (Z and a are rigidly connected at the front by a plate7', pivoted to the case or frame by pintles or projections The lowerplate d is of greater extent than the upper plate and supports thetype-bars f, which bear, preferably at their lower edges, on a wear orsupporting bar 7, supported by the lower plate d. These type-bars arearranged radially and are designed to be propelled forward against thetension of the retracting-springs 0 by the vertical movement of thekey-rods g, which are guided in apertures in the plates (Z and e andprovided at their upper ends with keys g bearing the ordinary typecharacters.

The downward movement of the key-rods transmits horizontal movement tothe typebars by means of the following connections:

The key-rods are slotted to permit the passage of wires or cords 'Z, oneend of each wire being secured to the plate (Z and the other end to thecorresponding type bar, as clearly shown in Fig. 1. Each key-rod carriesa pulley or roller Z, journaled in its slot and bearing against thewire, so that when the key-rod is depressed the wire will be drawn andthe corresponding type-bar propelled forward to strike the platen.Immediately upon the removal of the finger from the key the spring 0will retract the type-bar and simultaneously raise the key-rod to normalposition. I prefe ably provide antifrictionrollers 01. for. the wires,as shown in Fig. 7.

In order to accurately guide each type-bar, so that the letters will beproperly spaced, side plates 71: are provided, pivoted at 11 to thesides of the case. to which side bars the guides 7321.1'0 connected,these guides having inclined spaces converging to the printingpoint, asclearly shown in Fig. 2.

It will be observed that type-bars carry at their forward ends six rowsof type and that when the parts are normally in the position shown inFig. 1 the uppermost row of type will print. In order to bring thesuccessive rows into line, I provide the following-described mechanism:To the side bars A" are connected by eyes or staples 9, as shown in Fig.10, the rear ends of rods .9. which are connected at their forward endsto a curved bar 10, so that by the depression of this bar the guide willbe raised. The guide 7: carries at its lower side a plate 8, which hasan inclined face, and when the guide and plate 8 are lifted the forwardends of the type-bars will ride up said inclined face and be lifted adistance sufficient to bring the second row of type into position. Inorder to bring the third row into position, provide a key 1, carried byaverticallyanoving rod having an adjustable contact-screw 3, bearing ona plate 4: of a frame 4:, pivoted at 5 in the case and supported innormal position by an adjustable stop 6 at its rear end. The said rearend carries a bar t, which supports the plate at in normal position. Tobring the fourth row into printing position, it will be readily seenthat it is only necessary to simultaneously depress key 1 and bar 10.The fifth row is brought into line by a key 2, operating in the samemanner as key 1, and the sixth row by simultaneously depressing key 2and barlO.

In order to limit the amount of lifting of the rear end of guide is withrespect to the bar (Z, an adjustable set-screw 12 passes loosely throughan opening in the plate (Z and engages the member 8, the head of the pinengaging the plate (Z, and thus limiting the movement of said guide.

In order to prevent any undue raising of the type-bars as they ride upthe incline 8, a transverse roller is provided, bearing upon the upperedges of all the type bars and guided at its ends in vertical slots inguides g, secured at the sides of the frame.

Springs 0, connected with the ends of the roller, tend to hold itdepressed. I prefer to make the upper edges Ofthe type-bars inclined, asshown.

The platen is indicated at c, rotatably supported by the carriage b,which is of angular shape in cross-section, comprising, as shown, ahorizontal base portion and a vertical back portion and having endportions Z), in which the platen is journaled. The baseportion of thecarriage is provided with a longitudinal groove or channel 1 1, which isengaged by a rib or flange 15 on a cross-bar 16, supported by the sidewalls of the frame or case. By this means the carriage is guidedaccurately in its reciprocating movement.

The vertical wall of the carriage bears against a bearing-plate 18,which is adjustably carried by the frame-bar 17, so that by moving theframe-bar forward or back the carriage will be slightly tilted, andhence the platen moved toward or from the type. The adjustment iseffected by connecting the bar 18 to the frame-bar 17 by links 19, whichmaintain it always parallel to the line of print,

and locking-screws 20, which secure the bar, rigidly in any position towhich it may be adjusted.

In order to hold the paper pressed firmly against the platen,leaf-springs 13 are provided which partially encircle the platen andwhich are slidably supported by the carriage, whereby they may be movedtoward and from each other to accommodate various widths of paper.

In order to propel the carriage as the keys are depressed, I provide thefollowing described mechanism: A band or ribbon 22 is connected to oneend of the carriage, as indicated at 21, and is then carried around adrum or pulley 23 and connected to the opposite end of the carriage,preferably by a yielding connection, as indicated at 24:, so that assaid pulley is rotated the carriage will be moved a correspondingdegree. Two additional pulleys or drums 25 and 26, the latter beinglarger than the former, are rigidly connected to the pulley or drum 23,and over the drum 25 passes a brake-band 27, one end of which is rigidlysecured to the base of the case, as indicated at 28, while the other isyieldingly connected at 30 through a spring 29.

In the lower part of the case is located a frame composed of bars 31,32, 33, and 34:, which is pivotally mounted upon brackets or standards35. The bar 31 is wide enough to extend under all the key-rods and isdesigned to be pressed down thereby as the keys are depressed. Theamount of depression may be regulated by the set-screws 10, 41, and 4:2,carried at the lower ends of the type-rods. The bar 31 is kept normallyelevated by a spring 36, which may be in the form of an elastic passingover the end of bar 33 and having its ends secured to the floor of thecase, as

' shown.

To the end of the frame member or bar 33 is connected one end of a band38, which passes over the dr um.26 and is connected at its opposite endto the case through an elastic connection, such as spring 39. By thisarrangement as the bar 31 is depressed and the frame rocked the upwardmovement of the rear end of bar 33 will loosen band 38; but the slackwill be taken up by spring 39.

The pulleys or drums will be prevented from turning, however, by thebrake-band 27 on pulley 25, owing to its rigid connection at 28. Thusthe carriage remains stationary as the type-bar is moved forward toprint the letter. On the release of the key and the return of the bar 31to the position shown in Fig. 1 the downward movement of the rear end ofthe bar 33 will draw down upon the end of band 38, and the friction ofthe band upon the pulley or drum 26 will be suflicient, due to thedifference in size between pulleys 25 and 26, to overcome the frictionof the brake-band upon pulley 25, and hence the carriage will be movedone step or space while the type-bars are at rest.

It will be understood that the movement of the carriage will be greateror less according to the extent of movement imparted to the rockingframe, of which bar 33 is a part.

The amount of this movement is regulated by IIO the set-screws 40, 11,and 42, above referred to, and it will be noticed by this arrangementthe carriage may be moved a space equal to the width of the letterprinted, being moved a greater distance, for example, when an n1 isprinted than where the i key has been struck.

\Vhile the above operation would be true with the parts in the positionshown in Fig. 1 in printing the uppermost row of characters, it will beobserved that when bar (Z is raised to print other rows the key-rodswill be raised so as to carry them out of reach of the bar 31. It istherefore necessary to provide other means for spacing when either keys1 or 2 are depressed. This is accomplished by providing an arm 43,which. is located directly under the keys 1 and 2 and designed to bestruck by the lower ends 4L7 thereof. The arm 43 is pivotally connectedat one,end to the case and'inclines rearwardly and upwardly and isprovided at its rear end with a pin 45, which rests on a pin 46,projecting from the bar The arrangement of type on the third, fourth,fifth, and sixth rows is such that it is supposed that either keys 1 or2 will be depressed with every letter of these rows that is printed.Consequently when either key 1 or 2 is depressed its lower end 47 willcontact with arm 43 and through its connections, as above described,depress bar 33 and shift the carriage one space, as hereinbeforedescribed.

It is desirable to provide auxiliary means for controlling the width ofspace, and to ac complish this I provide a wedge 48 beneath the rear endof bar 33, which wedge is mounted upon a slide 49. To the opposite endsof this slide are secured the cords 50, which pass around pulleys 51 atthe rear corners of the case and thence forward and around pulleys 52 atthe front corners. lead to a slide-piece 53, which may be movedtransversely of the case by a lever handle or projection 53*. (See Fig.1.) It will be readily seen that as the wedge is moved under the end ofbar 3 a greater or less distance a greater or less movement will bepermitted to the said bar, and hence the space will be greater or less.

In order to space between words, I provide a key 55, connected by a rod55 with the bar 33, as shown more clearly in Fig. 9.

The line-space mechanism is shown more clearly in Fig. 4. This includesa sliding block 57, guided by the vertical wall of the carriage andoperated by a button 59. To the block is secured one end of a band 56,which partially encircles the platen and has its other ing it in moreorless the amount of movement may be varied, and hence the line-spacechanged.

In order to return the carriage to initial position for the commencementof a new line after a line has been finished, I provide the followingmeans: To the under side of the block 57 I secure the end of a wire orcord 62, which then passes under a pulley 63 on the carriage and acrossto and around a pulley 64 at the side of the case.

slide 65, guided on the side of the case, by

From this point they Thence it leads toa drawing on which the carriagemay be restored to initial position, it requiring a eomparatively slightpull to overcome the friction on the space mechanism. 7

It will be seen that the drawing back of the :arriage simultaneouslyrotates the platen,

owing to the connection of the cord to the I claim is 1. In atype-writing machine the combination with the carriage, of acarriage-propelling drum, a band passing around said drum and having itsends connected with opposite ends of the carriage, a lirake-drumconnected with said carriage- 'n'opelling drum, a brake-band contactingwithsaid drum and having one end rigidly connected with the frame andthe other yieldingly connected thereto, an operatingdrum connected tosaid first-named drums, a band contacting with said operating-drum andhaving one end yieldingly connected to the frame, and an operatingmember connected to the other end of said band, substantially asdescribed.

2. In a type-writing machine the combination with the su1: porting-frameand carriage of a carriage-propelling drum, a band passing around saiddrum and having its ends connected with opposite ends of the carriage, abrakedrum connected with said carriage-propelling drum, a brake-bandcontacting with said drum and having one end rigidly connected with theframe and the other yieldingly connected thereto, an operating-drumconnected to said first-named drums, at band contacting with saidoperating-drum and having one end yielding-l y drum, a brake-bandcontacting with said drum and having one end rigidly connected with theframe and the other yieldingly connected thereto, an operating-drumconnected to said first-named drums, a band contacting with saidoperating-drum and havlng one end yieldingly connected to the frame, anda key-operated rocking frame connected to the other end of said band,and independent space-controlling means, substantially as described.

4. In a type-Writing machine the combination With the carriage of acarriage-propelling drum, a band passing around said drum and having itsends connected With opposite ends of the carriage, a brake-drumconnected With said carriage-propelling drum, a brake-band contactingWith said drum and having one end rigidly connected With the frame andthe other yieldingly connected thereto, an operatingdrum connected tosaid first-named drums, a band contacting With said operating-drum andhaving one end yieldingly connected to the frame, a key-operated rockingframe connected to the other end of said band, a Wedge-piece locatedbeneath said rocking frame to limit its JEAN FRANQOIS DAVID.

Witnesses:

THOS. N. BROWNE, MARIN VAOHON.

